Feedeeick j



(No Model.)

F. J. HOYT.

' i ORB PURNAGE.V No. 272,959. a Patented Peb.27,1883.

i Lw

MX@ M c @f5/"M9 @ww "7% jig @gm Igye/J' @j @J Qi l E.

\ 12.2 jzc Go J f' J- 4 Z1-' 3. WITNBSSBS: 7 M lj( INVENTOR4 fr @LW/m,.71024, 7,4742

` v ATTORNEY- rTERS4 Pham-Limon:plwr waminghm, D. C.

PATENT OFFICE. e

FREDERICK J. HOYT, OF NEW YORK, N. Y.

ORE-FURNACE.

SPECIFICATION forming part of Letters Patent No. 272,959, dated February27, 1883.

Application filed April 2s. lese. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK J. HoY'r, a citizen ofthe United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Furnaces forDesulphurizing Ores, of which the following is a specification,reference being had therein to the accompanying drawings. y

The object of the present invention is to provide a furnace for rapidlyand thoroughly desnlphurizing ores; and this object I attain by thenovel and improved construction of parts hereinafter described, andpointed out in the claim.

The accompanying drawings illustrate a mode of carrying ont myinvention.

Figure l is an exterior view of a furnace embodying my improvements.Fig. 2 is avernear the top.

tical sectional view of the same. Fig. 3 is a horizontal sectiontaken'on thelinea1 wof Fig.2.

A represents the furnace, havinga fire-box, B, near the bottom, and ahorizontal flue, C, Immediately above the fire-box B is an inclinedplane, D, extending from the interior of the furnace, near one wallthereof, to the exterior through the opposite wall. The central portionof the furnace from top to bottorn is occupied by plat-cs or platformsE, arranged in pairs, so as to swing downward, like trap-doors. Thefluef, leading from the fire-box to the top of the furnace, is built inalternate opposite walls, so as to cause the products of combustion topass successively nnder and over the plates or platforms E beforereaching the final exit. These plates or platforms are so arranged withrelation to the ue that one platform has one edge towardtheiiue and thenext one above or below has the opposite edge toward the iiue. IEachplatform E is composed ot' two halves, arranged to swing downward, liketrap-doors, and to join each other when in a horizontal position. dooror plate is carried by a rock-shaft, G, having its bearings in the wallsof the furnace, at right angles to the walls in which the luef is built.One end of each rock-shaft extends beyond one wall of the furnace, andis bent horizontally at a right angle with the main portion, and carriesa weight, H, sufficient to connterbalance the weightof the plate ordoor. The other end of the shaft extends Each engage with the cams theupper ends are nearly in contact with each other. On the other wall ofthe furnace are a number of pulleys, L, one of which may have motionimparted to it from any suitable source and at any desired speed. Aroundthese pulleys passes an endless belt, M, which carries a tapering orwedge-shaped block, P. The horizontal line C, near the top of thefurnace,is provided with two transversesemi-partitions,ee2,oneextendingupw'ard from the bottom of the flue andthe other extending downward from the top of theflue, and between them,in the top of the flue, is an opening provided with a removable cover,s. Above this flue may beany desired number of plates or -platforms E.As here shown, there are two of said platforms abovesaid point.

The'operation of my invention is as follows: The ore to be desulphurizedis deposited in the furnace through a hopper, Q, at the top, insuccessive quantities, each deposit of ore being sufficient to justcover the platform to asuitable thickness to enable the flame to act onthe ore. All the platforms being supplied with ore, the flames from there box pass successively underand over each of the platforms and throughthe ore deposited thereon until they reach the ue C, where they pass outof the furnace. Motion being imparted to the belt- M, the block P, as itascends, passes succes- D, as shown in Fig. 2. When the lowest plat-yform is thus emptied, the weights H restore it to its closed position,where it is held by the en gagementof the pawls with the cams, so as tobe ready to receive the contents of .the next higher platform when thesame shall be opened IOO bythe action ofthe block P on the pawls K, asabove described, and this action is repeated until the highest platformis reached.

By this construction, arrangement, and operation of the parts, the oreis thoroughly stirred and turned over and over, so as to subject allparts of it to the laction ofthe Haines. 1f any particles or' meta-lshould be carried into the ue C, they are arrested by the semi-part WhatI claim as new, and desire to secure by Letters Patent, is

The combination, With the plates E and rockshat't G, provided withWeights H and cams J, of the pavvls K,belt M, and Wedge or bl0ck P, allsubstantially as shown and described.

1n testimony whereof I aix my signature in presence of two Witnesses.

FREDERICK J. HOYT.

titions e e2 and deposited between tl1em,whe'nce they may be removedthrough the opening covered by the cap or cover s.

Witnesses:

FRANCIS CLARE BOWEN, E. M. BENNETT.

